Ron, ILFORD Pan F+ is a very fine grained film, but it is not extremely sharp. PERCEPTOL yields an extremely fine grain, but at the cost of a loss of sharpness (as well as film speed). Combined, Pan F+ developed in PERCEPTOL will give a very fine grained negative, but it will not be extremly sharp. If you are truly looking for good sharpness, I think you will prefer the results with ILFORD 100 DELTA Professional. It is only slightly larger grained than Pan F+, but is much sharper. For best results of grain and sharpness, I would recommend either ID-11 or ILFOTEC DD-X.(posted 8536 days ago)As for the film/developer combinations, ILFORD films will work well in most manufacturer's developers, as well as the corrolary of ILFORD chemistry working well with other films. When films are being designed and tested, they are naturally testing predominatly using ILFORD chemistry, so it is to be expected that ILFORD chemistry will give as good or better results compared to other brands of chemistry.
Regards, David Carper ILFORD Technical Service